Patent GB-520718-A (GB)
Title: Improvements in or relating to machines for the production of looped fabrics
IPC: D04B15/66
Filed: 1939-05-15
Abstract: 520,718. Knitting-machines. DUBIED & CIE. SOC. ANON., E. May 15, 1939, No. 14447. Convention date; May 16, 1938. [Class 74 (ii)] A counting, device for use with knitting- machines, operating by means of a pattern device and including control means, such as levers or feeler members which are actuated by releasing means such as openings, dogs or studs 8 arranged on a counting - drum 1 in accordance with a pattern is characterized in that in order to permit the drum 1 and a counting band to be selectively taken into use for releasing the control means, the drum is provided with means for driving the band. The drum 1 is a coil of sheet metal fixed to a head 2 by studs 3 and 4. A series of punched holes 5 enable the drum to be fed on and be locked in position. The drum is numbered at 9. The head 2 is mounted on a pivot 12 carried by a bracket 13 which also carries a box 14 to accommodate feed and control elements 17...19. The bracket 13 also carries a rock shaft 23 with a lever arm 24 and a guide roller 25 and a rocking bolt 26 secured to a lever arm 27 and carrying loosely a lever arm 28. In the box 14 is guided a locking bolt 30 and a feed bolt 32, both being spring- urged, and both being actuated by the feed latch 17 by means of a control slot 33. In the box 14 i,s also mounted a support 35 for feeler plungers 36, 37 which are urged against the control latches 18, 19 by springs 38. Rear extensions on the plungers, 36, 37 are each coupled by a pin 39 to one of two lever arms 42, which swing on pivots 41 and are provided with hooked ends 40. Opposite the arms 42 are positioned latches 43 pivoted at 45 to lever arms 27, 28 and provided with hooks 44 for engaging the hooks 40. The feed and control elements 17...19 are moved inwards simultaneously by a driving arm 21 under pattern control. At the beginning of this movement the bolt 30 is in lowermost position (Fig. 4) engaging a hole in the drum 1 while the bolt 32 is clear of the drum. The effect of pushing in the element'17 is to reverse the positions of the bolts 30, 32. To feed the drum forward one division, a stop 46 on the slide 19 engages the support 35 and carries the feed bolt 32 along while it is in engagement with the drum. On the return movement of lever arm 21 another stop 46' engages and returns support 35 &c. to initial position. When the slide 19 has been moved to allow the parts 35, 46 to make contact a recess 47 underlies the plunger 36, which is thus lowered. under influence of spring 38, on to a pattern stud 8, if one should happen to be there. In this case the stud retains the parts 42, 43 in engaged position as shown in Fig. 6, and the part 43 is pushed in along with part 35. 32 &c. Should however there be no stud below the plunger 36, Fig. 5, the hooks 40, 44 disengage and the part 43 is not actuated. The lever arm 27, when actuated by its corresponding part 43 starts the control operation of the pattern chain. The lever arm 28, when actuated by its corresponding part 43 operates a stop-motion. After the drum has effected the number of feed stops required by the pattern, the pattern chain initiates a movement with the result that the shaft 23 and the arm 24 are rocked by the associated control members. This arm is raised so that the roller 25 bears against a pawl 57 in consequence of which the locking bolt 30 rocks ,a detent 48. by means of stud 34. If then the arm 24 is rocked a plunger 58 carried thereby engages the detent 48 and causes it to lift the bolt 30 by action on stud 34 so that the drum is free to rotate to initial position. The parts are reset by a dog 11 and the drum locked in initial position. Instead of the sheet metal drum 1, long bands, which may be of paper, joined together by detachable fastenings, may be used.